Article name Investigation of Acid Dezolization Process of Graphitized Metallurgical Dust Flotation Concentrate
Authors Orekhova , N.N. doctor of technical sciences, associate professor,
Fadeeva N.V. candidate of technical sciences, associate professor,
Zinchenko A.A. 4th year student, Geology, Surveying and Mineral Processing department,
Isaeva L.S. 2nd year student, Geology, Surveying and Mineral Processing department,
Bibliographic description Orehova N. N., Fadeeva N. V., Zinchenko A. A., Isaeva L. S. Investigation of acid dezolization process of graphitized metallurgical dust flotation concentrate // Transbaikal State University Journal. 2023. Vol. 29, no. 4. P. 73–84. DOI: 10.2109/2227-9245-2023-29-4-73-84.
Category Subsoil Use, Mining Sciences
DOI 622.7/622.234.42
DOI 10.2109/2227-9245-2023-29-4-73-84
Article type Original article
Annotation Promising raw materials for the production of flake graphite are graphitized dust from the metallurgical processing of iron ores. The problem of obtaining low-ash graphite from spel is associated with the search for an effective method for deashing flotation concentrates. The purpose of the work is to experimentally test the possibility of effectively reducing the ash content of flotation concentrate by chemical finishing with acid leaching. The object of the study is a flotation concentrate obtained from graphitized smelt of an oxygen converter shop. The objective of the study is to select an acid deliming method for further optimization of the process. The article provides information on the results of purification of natural graphite by treatment with solutions of individual acids and their mixtures by foreign researchers. The differences in the compositions of natural and technogenic graphite, which determine the choice of the method of acid leaching of ash components, are considered. A thermodynamic justification for the choice of a combination of hydrofluoric and sulfuric acids is given. The results of one-factor experiments on processing the concentrate with leaching solutions of hydrochloric, sulfuric, nitric and hydrofluoric acids and the results of an optical microscopic study of deashed graphite are presented. The dependences of the influence of the type of acid, the duration of leaching and the concentration of the solution on the leaching parameters are presented and analyzed. Optical microscopic analysis confirmed the effectiveness of using hydrofluoric acid for deashing graphite. It has been established that the addition of hydrofluoric acid to a 10 % solution of sulfuric acid in an amount of 0.5 relative% improves deashing performance. The ash content of the graphite concentrate after 90 minutes of contact with the complex leaching solution was reduced from 22.0 to 12.45 %. Further reduction of ash content without additional disintegration is difficult due to the presence of ash iron-oxygen inclusions in the interlayer space of technogenic graphite particles.
Key words technogenic raw materials, metallurgical dust, flake graphite, flotation concentrate, leaching parameters, ash content, hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid, acid combinations
Article information
References 1. Borbat V. F., Adeeva L. N., Charikov E. O. Analysis of the possibility of the process of fluoride processing of TPP ash. Bulletin of the Omsk University, no. 3, pp. 37–39, 2003. (In Rus.). 2. Gilmanshina T. R., Koroleva G. A., Lytkina S. I. Development of methods for desulfurization of hidden crystalline graphite. Mashinostroenie: network electronic scientific journal, vol. 8, no. 1, pp. 21–25, 2020. (In Rus.). 3. Molchanov V. P., Medkov M. A. Development of technology for purification of natural graphite of Russia from impurities using pyro-hydrometallurgy methods. Proceedings of the All-Russian Annual Workshop on Experimental Mineralogy, Petrology and Geochemistry. Moscow: V. I. Vernadsky Institute of Geochemistry and Analytical Chemistry of the Russian Academy of Sciences 2019. (In Rus.). 4. Fadeeva N. V., Orekhova N. N., Kolodezhnaya E. V., Nigmatova N. N. Study of physical and chemical regularities of the flotation process of graphite spelt. Bulletin of the MSTU named after G. I. Nosov, no. 4, pp. 37–46, 2022. (In Rus.). 5. Fadeeva N. V., Orekhova N. N., Gorlova O. Е. Experience in processing of graphite-containing dust of metallurgical production. Ferrous metallurgy. Bulletin of scientific, technical and economic information, vol. 75, no. 5, pp. 632–639, 2019. (In Rus.). 6. Schiptsov V. V. Graphite-bearing ore districts of the Fennoscandinavian Shield. Proceedings of the Karelian Scientific Center of the Russian Academy of Sciences, no. 2, pp. 33–49, 2022. (In Rus.). 7. Bu X., Tong Z., Bilal M., Ren X., Ni M., Ni C., Xie G. Effect of ultrasound power on HCl leaching kinetics of impurity removal of aphanitic graphite. Ultrasonics Sonochemistry, no. 95, 106–415, 2023. (In Eng.). 8. Chehreh Chelgani S. A review of graphite beneficiation techniques. Mineral Processing and Extractive Metallurgy Review, vol. 37, no. 1, pp. 58–68, 2016. (In Eng.). 9. Dan L., Maslov V., Trofimova L., Cios G. The Formation, Properties and Use of Dispersed Iron-Graphite Metallurgical Waste. Journal of Casting & Materials Engineering, vol. 6, no. 4. pp. 81–91, 2022. (In Eng.). 10. Frenier W. W., Growcock F. B. Mechanism of iron oxide dissolution – A review of recent literature. Corrosion, vol. 40, no. 12, pp. 663–668, 1984. (In Eng.). 11. Jara A. D., Betemariam A., Woldetinsae G., Kim J. Y. Purification, application and current market trend of natural graphite: A review. International Journal of Mining Science and Technology, vol. 29, no. 5, pp. 671– 689, 2019. (In Eng.). 12. Kuzin A. V., Gorichev I. G., Lainer Y. A. Stimulating effect of phosphate ions on the dissolution kinetics of iron oxides in an acidic medium. Russian Metallurgy (Metally), vol. 2013, pp. 652–657, 2013. (In Eng.). 13. Li J., Liu R., Ma L., Wei L., Cao L., Shen W., Huang Z. Combining multiple methods for recycling of Kish graphite from steelmaking slags and oil sorption performance of Kish-based expanded graphite. ACS omega, vol. 6, no. 14, pp. 9868–9875, 2021. (In Eng.). 14. Mustika D., Torowati T., Dimyati A., Sudirman S., Fisli A., Joni I. M., Langenati R. Purification of Indonesian Natural Graphite as Candidate for Nuclear Fuel Matrix by Acid Leaching Method: Chemical Characterization. Urania: Jurnal Ilmiah Daur Bahan Bakar Nuklir, vol. 26, no. 3, pp. 157–176, 2020. (In Eng.). 15. Peng W., Qiu Y., Zhang L., Guan J., Song S. Increasing the Fine Flaky Graphite Recovery in Flotation via a Combined MultipleTreatments Technique of Middlings. Minerals, vol. 7, pp. 208–218, 2017. (In Eng.). 16. Syarifuddin F., Florena F. F., Hanam E. S., Trisko N., Kustiyanto E., Enilisiana E., Arinton G. Syarifuddin F. Effect of acid leaching on upgrading the graphite concentrate from West Kalimantan (Indonesia). AIP Conference Proceedings. – AIP Publishing, vol. 1712, no. 1, pp. 121–131, 2016. (In Eng.). 17. Zhao S., Cheng S., Xing B., M., Shi C., Cheng G., Zhang C. High efficiency purification of natural flake graphite by flotation combined with alkali-melting acid leaching: application in energy storage. Journal of Materials Research and Technology, vol. 21, pp. 4212–4223, 2022. (In Eng.). 18. Method of graphite purification. Electronic resource. Web. 11.09.2023. newsshow-131-248-1.html. (In Eng.). 19. Thermal constants of substances. ( Web. 14.08.2023. plshow=welcom.html&ysclid=lnw5zcdg4e519215504 (In Eng.).
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